Freight-car door.



PATENTED SEPT. 15, 1903.

P. MUMULLEN.

FREIGHT GAR DOOR.

APPLIUATION Hmm ooT.1. 1902.

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P. MOMULLEN.

FREIGHT CAB. DOOR..

APPLmATIoN FILED 00121, 1902.

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E /zffx C HTTEIHNEY UNITED STATES" atented September 15, 1903;*1

FREIGHT-CAR Doon.

SPECIFICATION forming part of Letters Patent No. 738,834, dated September 15, 1903. Application filed O'ctoljer l, 1902. Serial No. 125,597. (No model.)

To LZZ whom it may concern.-

Be it known that I, PETER MCMULLEN, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Freight-Car Doors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in freight-car doors, and more particularly to that class of door which when closed will lie Hush with the side of the car.

The main object of my invention is to provide the door and its casing with engaging parts, which not only guide the door into closed position within the casing, but serve to assist in holding the door in such closed position after it has been bolted.

To that end my invention consists of a certain novel arrangement and combination of parts, all of which will be particularly hereinafter described and claimed.

In the drawings, Figure 1 is a front elevation of a portion of the side of a car, showing my improved door in closed position. Fig. 2 is a similar View in perspective, showing the door in open position. Fig. 3 is an end elevation of the door detached. Fig. 4is a horizontal section of Fig. 2, taken in the line mm. Fig. 5 is a top plan view of the door detached. Fig. 6 is an under side View of the door detached, and Fig. '7 is a fragmentary elevation of the door detached.

Referring to the drawings, which illustrate the application of my invention to a freightcar, 1 is a portion of the side of a car in which is constructed a casing 2. (See Fig. 2.) Upon the sill 3 of thek casing is secured the metal plate 4, upon the upper left-hand end of which is the raised flange 5, having the inclined side 11, which forms one of the guiding and resisting surfaces of such late. The other or righthand end'of plate f is provided with the in'- clined end 6, which forms the other guiding and resisting surface of such plate.

7 is a projecting guiding-nose to direct the door into its casing 2 and forms a prolongation of the guiding and resisting surface 6. Upon the upper portion of the casing 2 is secured the metal plate 8, which is inclined on its side 8a to form an additional guiding and resisting surface. one of these plates, if desired. At the opposite end of the sill 3 is the metal plate 9, which is secured to the beveled side 10 of the casing, and it forms the guiding and resisting surface. The door 12 has at each end of its up; per side the friction-rollers 13 13, mounted in thehangers 14 14, bolted to the door 12. These friction-rollers 13 13 ride separately on the horizontal rails or carriers 15 l5, the left-hand ends of which are curved into chambers 16 16 in the side of the car.

17 is an angular stop to limit the travel of the door 12to its open position, and 18 18 are angularguides to prevent the door from swingL ing out as it travels to its open position.

19 is the handle for manipulating the door. In place of this construction a single rail secured tothe side of the car and friction-rollers mounted in swinging brackets on the door could be employed with the same results.

On the under side of the door l2 is rigidly secured the metal plate 20, having the righthand depending flange 21 with the beveled inner edge 22, which forms a'guiding and resisting surface adapted to register with the similar surface 6 on the plate 4 upon the sill of the casing. The right-hand side 23 of door 12 is beveled to adapt it to register with the beveled side 9 of the casing when it is in closed position.

The left-hand end of plate 2O has the beveled surface 24, adapted to register with the similar guiding and resisting surface 11 on the plate 4 upon the sill of the casing. Upon the upper edge of the door l2 is rigidly secured the plate 25 with the inclined guiding There may be more than and resisting surface 26, adapted to register with the similar surface 8 in the casing.

Centrally secured upon the beveled end 23 of the door 12 is the metal plate 27, having the socket 28.

Abolt 29, with attached hasp 30, coperates with the socket 28 in the door to lock the same.

The hasp is movable to and from its securing-staple 31 in the groove 32 in the side of the car.

In operation the door is shifted into open or closed position by pressure upon the handle 19. As the door startsto leave its casing -and assumeA its open position, the contact of the guiding-surfaces 2l and 22 on the door, with the guiding-surfaces 1l and 16 on the sill 4, throws the door into a position away from and parallel to the side of the car, enabling it to be slid away from its casing to open the car. The same guiding action occurs as the door slides back into its closed position in the casing. The inclined plates 8a and 25 on the upper part of the sill and the door assist in the guiding and resisting operaiton. After the door has been bolted the guiding-surfaces act in the additional capacity of resisting-surfaces to assist in holding the door against the outward thrust of the load within the car under either static or dynamic conditions. The construction above outlined insures the absolute stability of the door when closed and bolted Within the casing. The guiding and resisting suring prevent undue pressure of the carryingrails.

The positions of the securing bolt and socket may be reversed Without departing from the spirit of my invention.-

I claiml. The combination with the reciprocating door provided with the angular guiding and resisting surfaces 22 and 24: upon its under edge, of the door-casing provided with the angular guiding and resisting surfaces 6 and 11 upon its sills adapted for register with those upon the door and the projecting guiding-nose 7 forming a prolongation of the guiding and resisting surface 6, as and for the purpose stated.

2. The combination with the reciprocating door provided with the angular guiding and resisting surfaces 22 and 24 upon its under edge and 26 upon its upper edge of the doorlcasing provided with the guiding and resisting surfaces 6 and 1l upon its sill andSa upon its upper portion adapted for register with those upon the door, and the projecting guiding-nose 7 forming a prolongation of the guiding and resisting surface 6, as and` for the purpose stated. v

I n testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

PETER MCMULLEN.

Witnesses:

ALLAN L. BURTON, W. T. MILLER. 

